Tires extra consumption enormous !

Hello to each other Have found something strange, far more than the 5% claims of the specialist dealers Already after that it mounts much of the first kilometers on the BC of the Cit Xsara Picasso 1.6i ! Previously tires Michel EnergySaver 6years old, still about 20% profile 6.5litres Super. With factory new winter tires, 8 liters Super, even at almost 0.7bar more inside. As a little warmer even 8.5litres with the soft winter flaps became. Now again the 20% profile summer Michel EnergySaver on it, again by 6 liters Super. In the past, modern tires seem to have been optimized for increased consumption, reduced service life and more soil adhesion. Those who drive wisely and understand physical principles do not necessarily need these energy-depleting rubber compounds. The first ABS vehicles also had the statistically most accidents, which is why the insurance companies cut the discount of 10%, and increased contributions. That is almost the vie I think if the EnergySaver is new, it consumes more again. But that the difference in consumption can be so big, I would not have thought now. Can it be that it is the lower consumption on special tires, by far greater than the only < 5% which are claimed ? And they always calculate the extra costs ? I am strongly considering whether I make the same on it again. Greeting Hubert71